spider.pl error part deux

Also, when I run ./swish-e -S prog -c example6.config the first few lines
before hundreds of error lines I see:
Indexing Data Source: "External-Program"
Indexing "/usr/local/rich/spider.pl"
Name "HTML::Tagset::linkElements" used only once: possible typo at
/usr/local/rich/spider.pl line 498.
/usr/local/rich/spider.pl: Reading parameters from 'default'
What does the following error mean?
Use of uninitialized value at /usr/local/rich/spider.pl line 504.
I've cut line 503 and 504 and am pasting it here.
for ( @$links ) {
if ( $attr{ $_ } ) { # ok tag
I'm using the -S prog method and SWISH-E 2.1-dev-25.
Thanks,
Rich
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